Below is an excerpt from the 2020 UGA Corn Production Guide (page 79): The key to storing grains and other commodities on the farm is to make storage conditions unfavorable for the survival of stored grain insects and molds. Growers who will be storing for more than 6 months should strongly consider application of a grain protectant. Apply an approved grain protectant directly to the moving grain stream at the bottom of the bucket elevator or auger so the material has an opportunity to contact as many kernels as possible as the grain is moved.
Insecticides labelled for empty bin treatments
- Beta-cyfluthrin Tempo SC Ultra 0.25-0.5 fl oz/gal/1000 sq ft 3A Apply to all interior surfaces of storage bin and allow to dry before filling bins.
- Deltamethrin Centynal EC 0.25-1.5 fl oz/gal/1000 sq ft 3A Apply to wall and floor surfaces of grain bins and warehouses prior to storing or handling grain.
- Deltamethrin D-Fense SC 0.25-1.5 fl oz/gal/1000 sq ft 3A Use for exterior perimeter treatment only.
- Deltamethrin Suspend SC 0.25-1.5 floz/gal/1000 sq ft 3A Apply finished spray to equipment, wall and floor surfaces of grain bins and warehouses prior to storing or handling grain.
- Diatomaceous earth Insecto Dust: 1 lb/1000 sq ft Apply at least 2-3 days before filling bin. Use aeration fan or other air supply to apply dust.
- Diatomaceous earth Dryacide 100 Dust: 1-3 lb/1000 sq ft Slurry: 1.5 lb/1.5 gal/100 sq ft Apply as a dust with a hand or power duster or as a slurry spray.
- Diatomaceous earth Protect-It Dust: 0.6 lb/1000 sq ft Slurry: 1.5 lb/1.5 gal/100 sq ft Apply 2 weeks before filling bins. Use a dust blower or bin fan to reach all surfaces, cracks and crevices. Apply slurry as a fine mist.
- Deltamethrin + chlorpyrifos methyl Storcide II 1.8 fl oz/gal/1000 sq ft 1B+3A Application can only be made from outside the bin using automated spray equipment.
- Pyriproxyfen Nyguard IGR Concentrate 0.8-2.4 tsp/gal/1500 sq ft 4-12 ml/gal/1500 sq ft 7C This product will not kill adults but will control immatures. May be mixed with an adulticide.
- S-methoprene Diacon-D IGR 1.5 oz/1000 sq ft 7A This product will not kill adults, but will control immatures; applicators must wear a dust mask and protective gloves.
- S-methoprene Diacon IGR Fogging Treatment: 1 ml/1000 sq ft (0.2 tsp/1000 sq ft) Pressure Spray: 2 ml/1000 sq ft (0.4 tsp/1000 sq ft) 7A Apply fogging treatment in water or oil in a cold aerosol generator. Diacon IGR is an insect- growth regulator that interferes with the development of insects. It will not kill adult insects. Apply as a pressure spray in low-pressure sprayer to all areas that may harbor insect pests.
Insecticides labelled for direct application to grain as a grain protectant
- Pirimiphos-methyl Actellic 5E 8.6-11.5 fl oz (corn) 8.6-11.5 fl oz (grain sorghum) 1B Labeled for use on shelled corn, popcorn and grain sorghum only. DO NOT use if grain has been previously treated with Actellic or if Actellic will be used as a topdress treatment.
- Deltamethrin Centynal EC 8.5 fl oz (corn) 9.1 fl oz (wheat) 4.9 fl oz (oats) 8.5 fl oz (grain sorghum) 8.5 fl oz (rye) 3A Labeled for use on barley, corn, oats, popcorn, rice rye, grain sorghum, and wheat.
- Deltamethrin D-Fense SC 8.5 fl oz (corn) 9.1 fl oz (wheat) 8.5 fl oz (oats) 8.5 fl oz (grain sorghum) 8.5 fl oz (rye) 3A Labeled for use on barley, corn, oats, popcorn, rice, rye, grain sorghum, and wheat.
- S-methoprene Diacon IGR 1.8-7 fl oz (corn) 1.8-7 fl oz (wheat) 1-4 fl oz (peanuts) 1-4 fl oz (oats) 1.8-7 fl oz (grain sorghum) 7A Labeled for use on wheat, corn, grain sorghum, barley, rice, oats, peanuts, and sunflower. Will not control weevils. Diacon IGR is an insectgrowth regulator that interferes with the development of insects; it will not kill adult insects. Treat existing insect populations with an adulticide before or at the same time as applying Diacon IGR. Apply only once to grain of known treatment history. Use highest rates for maximum residual. Lowest rate provides shorter residual.
- S-methoprene Diacon-D IGR 8-10 lb 7A Labeled for use on cereal grains, corn, sunflower, canola, legumes, popcorn, wheat, spices, grain sorghum, rice, cocoa, peanuts, oats and millet. Will not control weevils. Diacon-D IGR is an insect-growth regulator that interferes with the development of insects. It will not kill adult insects. Treat existing insect populations with adulticide before or at the same time as applying Diacon-D IGR. Apply only once to grain of known treatment history
- Deltamethrin + s-methoprene Diacon IGR PLUS 9-18 fl oz (corn) 9.6-19.2 fl oz (wheat) 5.2-10.3 fl oz (oats) 8-16 fl oz (grain sorghum) 9-18 fl oz (rye) 3A+7A Labeled for use on barley, corn, oats, popcorn, rice, rye, sorghum and wheat.
- Diatomaceous earth Dryacide 100 1-2 lb/ton Thoroughly mix with grain. For use on grains, soybeans, peanuts, popcorn, and others (see label). Diatomaceous earth products are less effective when used on grain with increased moisture content and under humid conditions; diatomaceous earth is known to decrease test weight and grain flowability.
- Diatomaceous earth Insecto 1 lb/ton 1-2 lb/ton (if infested) Apply uniformly as a dust on grains, soybeans, peanuts, popcorn, and others (see label). See note above.
- Diatomaceous earth Protect-It 18 lb (wheat, beans, peas) 9.6 lb (oats) 16.8 lb (rye) Uniformly treat grain as it is loaded into bin. For use on grains, soybeans, peanuts, popcorn, and others (see label). See note above.
- Spinosad Sensat 9.8 fl oz (corn) 10.5 fl oz (wheat) 5.9 fl oz (oats) 9.8 fl oz (grain sorghum) 5 Labeled for use on barley, bird seed, corn, foxtail millet, pearl millet, proso millet, oats, sorghum, triticale and wheat.
- Deltamethrin + chlorpyrifosmethyl Storcide II 12.4 fl oz (wheat) 11.6 fl oz (grain sorghum) 6.6 fl oz (oats) 1B+3A Dilute with water or an FDA-approved food grade mineral oil or soybean oil. For use on wheat, barley, oats, rice, and grain sorghum.
Colquitt County ANR Agent, Jeremy Kichler, is hosting a Cotton Insect Update Zoom Meeting for area growers, consultants and retailers. The update starts at noon on Friday, July 24 and will maybe last an hour. Phillip Roberts is the keynote speaker and will give an update on whitefly and other insect challenges we are currently facing in cotton.
1 hr of private and commercial pesticide credit and 1 hr of CCA credit will be offered.
Join Zoom Meeting
Growth Responses and Financial Returns from Silvicultural Treatments in Southern Pine Plantations Seminar
See the document below about a forestry continuing education program:
Unlike cotton production areas in the Mid-South, tarnished plant bug is an uncommon and sporadic pest of Georgia cotton. However, tarnished plant bug populations must be scouted as economic infestations occur in some fields each and every year. Only treat tarnished plant bugs if threshold levels are exceeded. Tarnished plant bug sprays are disruptive to beneficial insect establishment. Our primary method for scouting plant bugs is square retention. Our goal is to retain 80 percent of all first positions as we enter bloom. The square retention technique works well in pre-bloom cotton but is not as a reliable technique in blooming cotton as physiological shed confounds counts. More scouts are using sweep nets to monitor plant bugs. Sweep nets are an excellent tool for
monitoring adult plant bug populations, but the drop cloth (especially a black drop cloth) is more effective for monitoring immature plant bugs.
Adult tarnished plant bug (left) and immature tarnished plant bug in bloom (right). Images by Russ Ottens, University of Georgia and Ron Smith, Auburn University, Bugwood.org.
Effective use of the sweep net becomes difficult after bloom due in part to plant size and more emphasis should be placed on use of a drop cloth. Also be observant for both adult and immature plant bugs when making visual plant inspections; examine terminals and inside the bracts of squares, blooms, and small bolls. Also be observant for “dirty blooms”, blooms in which many of the anthers are dried and brown. Dirty blooms are an indication that plant bug (especially nymphs) are feeding on larger squares which the plant did not shed.
“Dirty Blooms”. Images by Ron Smith and Barry Freeman, Auburn University, Bugwood.org.
Clouded plant bug adult (left) and immature (right). Images by Ron Smith, Auburn University, Bugwood.org.
Tarnished plant bug thresholds can be used for clouded plant bugs, but clouded plant bugs should be counted 1.5 times when using a sweep net. Note that the threshold is higher during the third week squaring and bloom compared with the first two weeks of squaring.
Sweep Net and Drop Cloth Thresholds:
Third week of squaring through bloom: Drop Cloth: 3 plant bugs/6 row feet, Sweep Net: 15 plant bugs/100 sweeps
First 2 weeks of squaring: Drop Cloth: 1 plant bug/6 row feet, Sweep Net: 8 plant bugs/100 sweeps
As a result of great team work with the Georgia Department of Agriculture and BASF, Georgia cotton farmers have a new Liberty label allowing shortened intervals between sequential Liberty applications which can improve weed control.
Research has shown understanding the time interval between sequential post applications is one of many critical components for an effective weed management system. The figure below compares 6 inch Palmer amaranth response to sequential Liberty applications as influenced by interval between applications. Obviously, one needs to spray Liberty when the biggest pigweed in the field is 3” for complete control and in this event a follow up application can be made when the next flush of pigweed reaches 3”. With the challenging weather during 2020, spraying all weeds at 3” or less may not be practical for some fields; thus, when pigweed is too large to kill with the first application then the second application timing is important.
DO NOT MAKE MORE THAN TWO LIBERTY APPLICATIONS in a season for resistance management purposes; follow the second Liberty application 10-12 days later with a layby directed application including conventional chemistry such as Diuron + MSMA + Crop Oil or Roundup + Diuron (add Envoke with layby if morningglory or nutsedge is an issue; check carryover)!
Few critical points from the label: 1) One must have 24 (c) label in hand when making application; 2) Liberty may be applied twice over-the-top of glufosinate-tolerant cotton as long as there is at least a 5 day interval between applications; 3) Do not include tank mix partners when making two applications less than 10 days apart. 4) Do not apply more than 36 oz/A overtop of cotton per application.
Click the following link to view the Liberty 280 SL FIFRA Sec. 24(c) Special Local Need Label: Liberty 280 SL NVA 2020-04-594-0079 shortened seq interval 04-14-2020b_24c GA-20003
Dicamba (A. S. Culpepper). On June 8, 2020 the U.S. EPA released critical information on Engenia, Fexapan, and XtendiMax. The entire release can be found at https://www.epa.gov/newsreleases/epa-offers-clarity-farmers-light-recent-court-vacatur-dicamba-registrations
Please visit the website for details; however, below are the details of the order:
“Details of the Order
EPA’s order addresses sale, distribution, and use of existing stocks of the three affected dicamba products – XtendiMax with vapor grip technology, Engenia, and FeXapan.
- Distribution or sale by any person is generally prohibited except for ensuring proper disposal or return to the registrant.
- Growers and commercial applicators may use existing stocks that were in their possession on June 3, 2020, the effective date of the Court decision. Such use must be consistent with the product’s previously-approved label, and may not continue after July 31, 2020.”
Weed Control Thoughts (Use only labeled products and follow all labeled directions and restrictions):
Scenario One: Large pigweed with enough in-crop dicamba for two applications: Spray labeled Roundup + dicamba immediately, wait 7 to 10 days and then make a second application; 12 days later run the layby rig with either 1) Direx + MSMA + Crop Oil if grasses are not up or 2) Roundup + Direx if grasses are up (add Envoke with layby if morningglory or nutsedge is a problem).
Scenario Two: Large pigweed with enough in-crop dicamba for one application: Spray labeled Roundup + dicamba immediately, wait 7 to 10 days and then make a Liberty tank mix application; 12 days later run the layby rig with either 1) Direx + MSMA + Crop Oil if grasses are not up or 2) Roundup + Direx if grasses are up (add Envoke with layby if morningglory or nutsedge is a problem).
Scenario Three: Large pigweed with no dicamba available. Sequential Liberty applications will be best approach although less effective than either dicamba system above. We were able to obtain a new state label for Liberty shortening intervals between sequential applications which will improve control (sending information in blog tomorrow).
- Tavium registration was not revoked and therefore the herbicide is not impacted as of now.
- The Enlist program of herbicides are following a similar path to that of Engenia, Fexapan, and XtendiMax in the court system. No one can predict the future.
- In Georgia, we have all worked so hard to steward every pesticide and we should collectively be proud! However, this is a wake-up call in several ways. First, we must work together even harder generating sound science to preempt this type of situation in the future. Second, for those few growers who have down played the importance of using all pesticides wisely, what a wake-up call!!!!